Hi there,

I try to use the ValidatorCalloutExtenders on my page associated to customvalidators and requiredfieldvalidators.



Every thing works fone on my dev machine, and also works fine on the production server the first time.

I mean on the production server, the first time the page is displayed, If I don t enter a text in my textbox then the ValidatorCalloutExtender displays the error message associated to the RequiredFieldValidator, but when the page is displayed on the browser with an IE error on page in the buttom bar, when I double click to read the IE error on page , I get this:

Sys.ArgumentUndefinedException: Value cannot be Undefined.
Parameter name: id


Please notice that this only happens in the production server and not in the dev machine.

Thanks for your help.